From a company founded in 1969, the two-group La Spaziale (either the S3 or Seletron Plus models) is ubiquitous throughout San Francisco. While considered a pretty decent machine, there's an incredibly high correlation between over-extracted and poor grade espresso in San Francisco and the use of these machines. Because there are a few notable exceptions, I think it is less about the machines and more about the institutions that buy them and/or the service and tuning they receive in the area. They also sell ice cream shop equipment.